Refuse-destructor.



, H. N. LEASK.

REFUSE DESTRUCTOR. A'PPLYxcmoN FILED' N'ov. 2s, 1912.

Patented'Aug. 3, 1915.

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El 1 N 'd" H. N. LEASK. REFUSE DEsTRucToR. APPLlcAloN man Nov. 23, 1912.

Patented Aug'. 3,1915.

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HENRY NORMAN LEASK, OF LISCARD, ENGLAND.

REFUSE-DESTRUCTOR. l

Marrow.

Specification of Letters Ifatent.

Patented Aug. 3, 1915.

Application filed November 23, 1912. seria1 ne. 733,148.

To all lwhom t may concern.'

Be it known that I, HENRY NORMAN LEAsK, a subject of the King of England, residing at `Liscard, Cheshire, England, have invented certain new and useful Improvements in Refuse-Destructors, of which the following is a specification.` y

This invention relates to improvements 1n grates for refuse-destructor furnaces of the type known as ktrough grate, such as delscribed in my British Patent No. 22,137 of 1909, or of other form.

The object Aof the invention 1s to lncrease the capacity of the grate, to make it easier,

to break up and cool the clinker of the grate, to enable the fresh charge to restart more easily after the clinkerA has been withdrawn, and to generally facilitate c/linkering of the grate.

The invention consistsin constructing a trough grate, with one or more hollow projections above the trough bottom upon which the fuel lies and through which airY proved grate embodying the features of the invention. Fig. 2 is a longitudinal section of the improved grate. Fig. 3 is a transverse section of the grate showing a modi iication of the clinker draw-bar. Fig. 4 is a top plan view of a portion of the grate embodying the modification as shown by Fig. 3.

The sides A of the trough are preferably made of perforated plates and the bottom B also preferably of perforated solid plates is built up or formed with a central hollow structure C projecting upward toward the center of the trough of such a form that the refuse or fuel can lie at both sides and pile up on top thereof giving to the lower part of the grate the appearance ofa double trough.

The upwardly projecting central structure C is of any suitable size and shape preferably having two inclined converging sides meeting at the apex of an angle-such sides being somewhat curved or iiat in section. Or it may be of semi-hexagonal, octagonal or cylindrical shape. The top portion of this projection may be made separately so that it may be renewable. The inner sides of this projection may be provided with ribs where desired.

The structure is hollow to form an air passage c throughout the whole length of the trough or'only a portion of it or so constructed as to only supply air to one portion o f the grate, and is provided with perforations c1 at the top through the whole or a part of its length and also at the sides to deliver air. to the central mass of fuel.

y It may be divided internally into com-` partments as shown in Fig. 2 to each of which theair may be separately delivered.

In the modification shown in Fig. 3 the hollow structure C is provided with a longitudinal slot or slit c? and perforations el.

The air supply is brought through the side ducts D which provide the lateral air y su'pply to the grate through the apertures d.

Or it may be brought through the ash pit or otherwise independently of the lateral air supply, so that it may be used lafter the lateral supply has beencut off, suitable supply valvesor dampers being provided. Or there may be a double set of air supply ducts if desired.

It is to be understood that one or two or more of such structures may be fittedon the trough bottom.

The central hollow structure and the grate are preferably inclined downward toward the front of the grate to facilitate the removal of the clinker therefrom.

A draw bar T with or without a draw plate T1 is placed in the bottom of the grate at each side of the structure C to remove the clinker therefrom and from the bottom of the grate as shown in Fig. l (as described in British specification 22137 of 1909).

Or a draw bar T having` a draw plate T1 at one end is placed in the interior of the structure C tl 'e end projecting through the longitudinal slit or slot 02 in the top thereof as shown in F ig. The draw-bar is notched at intervals to allow of the passage of air directly upward at the apex of the in the furnace and receive the next charge and thus the one bar is re-used again and again.

In the arrangement shown in Fig. 1 where the clinker rests on the top. of the draw bar T there is no difficulty in clearing it of clinker and returning it to the furnace.

Having n'ow particularly described and ascertained -the nature of my said invention and in what manner the same is to be performed, I declarev that what Iclaim is l. In a refuse destructor of the class specilied, a trough-shaped grate having longitudinal hollow projecting means rising from-l the grate surface to a level considerably below the upper portions of the" grate sides I and provided with outlets at the top thereof to bring a supply of air to a point below the surface of the fuel and nearlyV to the center of the fuel in the grate, the walls of the proy. jecting means being converged in anhp ward direction,. the grate being also prof' vided with a jacket forming a chamber bei-f,

' tween it and the sides of the grate andpro jecting nearly to the top of the sides'of .the grate and-to a height above the projecting means, the air space being formed formair which is supplied underl pressur'e to thelashf pit and, caused .to pass upwardly throughA 'the said air space over the top'edge of theel jacket and through the hollow walls of the" v fied, a trough-shaped-rgratef,having one or projecting means to the fire, the air un'dfe' pressure also reducing the temperature* of' the edge of the Vgrate to prevent burning out of the same. i' j-V w 2. In a refuse destructorpfftheclass specimoreflongitudinal hollow projections r'ising above the top surfaceof-thefgrate ttom and provided withzoutletsatA the jtop..w here- Y of to bring a supply. of air more hea-ily to -u wardly through said space over? the top the center of the fire, the walls of:A the prof-.2 jections being converged in an upward direction, the grate being also -provided..with Y. a jacket forming a Lchamber between. it. andl to the top ofthe sides-'df the grategan'air space being formedv for air whichf-i'ssp-- plled underpressure lto thej'ashFp/itgt pass" e ge of the jacket and through the" hollow walls to the fire and at the same time reduce the temperature of theedge of the grate to prevent burning out of the same, and one or nesses..

forwardly'to the rkfront of the latter.

3. In a refuse destructor, a grate having a trough-shaped bottom with a perforated hollow structure rising therefrom above the said-bottom and provided with an air Afueed ing jacket atV opposite sides thereof the 'said jacket feeding lfair to the hollow structure, and a draw-barhaving the greater portion thereof inclos'ed within the said hollow structure and `provided with an angular member at-its rearend movable within the trough-'shaped bottom close to the said hollow structure to draw the contents of 'the grate toward the front of the latter. .A ,f

4;, azfrefuse destructor of theclassspeciiediarfg projecting abovethe top surface of the bottom"`and, having a longitudinalv slot in the upperl portionl` 'thereof, andqa draw-bar mainly'i1l'zlsed. within the` said hollow `structure Aand slidably engaging the longitudinal fslot,' the draw-bar being provided witha-Ii" angularf-mer'nber at its rear end -whichffis 'exposed vin lthe trough-shaped bottonf the grate to draw the contents of the latter ,toward the front of the grate. 5. In a refuse destructor ofthe class specified, a grate having'a trough-shaped bottom with one or more hollow` apertured l 'structures projecting above Athe topl surface fthe said trough-shaped bottom to deliver draw-bar mounted each .ofthe struces and mainly 'inclosed .within v the latter to prevent'embedding, of 'said ,draw-bar "'i"fn",thefclinken'v each .draw-bar having an angular; clinkeir' withdrawing means vexposed within the grate, eachy hollow structurebethe sides of the grate and projecting nearlybfing y provided with Aan airfeeding jacket at opposite sides thereof.

- In'testimony whereof I have hereunto set my hand in presence of two subscribing witl v ..I-IENRY NORMAN LEASK. Witnesses: Y

'ERNALD SrMPsoN MosELEY,

MALCOLM SME'THU'RST.

iito the center of the body of the fuel, and

j rate having a trough-shaped bottom provided wittlr an apertured hollow structure 

